package com.woniuxy.house.web;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.woniuxy.house.vo.ResponseEntity;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

/**
 *
 * 获取生成的验证码图片
 * @author baobo
 * @date 2022-08-19-10:09
 */
@Controller
public class CaptchaController {
    @Autowired
    private DefaultKaptcha defaultKaptcha;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @GetMapping(value = "/captcha")
    @ResponseBody
    public void getKaptchaImage(HttpServletRequest request, HttpServletResponse response) {
        ServletOutputStream out = null;
        String captchaKey=request.getParameter("key");
        try {
            response.setDateHeader("Expires", 0);
            response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
            response.addHeader("Cache-Control", "post-check=0, pre-check=0");
            response.setHeader("Pragma", "no-cache");
            response.setContentType("image/jpeg");
            //生成验证码
            String capText = defaultKaptcha.createText();
            //将验证码存在redis中
            stringRedisTemplate.opsForValue().set(captchaKey,capText,60, TimeUnit.SECONDS);
            //HttpSession session = request.getSession();
			//SecurityContextHolder.getContext().setAuthentication();
            //session.setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);//KAPTCHA_SESSION_KEY
            //向客户端写出
            BufferedImage bi = defaultKaptcha.createImage(capText);
            out = response.getOutputStream();
            ImageIO.write(bi, "jpg", out);
            out.flush();
            //将键发给前端
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}
